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x86/xsaves: Clear reserved bits in xsave header

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The reserved bits (128~511) in the xsave header must be zero according to
X86 SDM. Clear the bits in this patch.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-12-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Fenghua Yu 2014-05-29 11:12:39 -07:00 committed by H. Peter Anvin
parent facbf4d91a
commit 21e726c4a3
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/i387.c
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@ -375,7 +375,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
/*
* These bits must be zero.
*/
xsave_hdr->reserved1[0] = xsave_hdr->reserved1[1] = 0;
memset(xsave_hdr->reserved, 0, 48);
return ret;
}